This is the impression of the scientists from Sixty Symbols of Easter eggs. They got some Cadbury Creme Eggs and real eggs, and put them in an MRI scanner. The MRI scanner mapped the fat and the water in the eggs. Bonus from this video is also "how the MRI scanners work".
Sir Peter Mansfield developed a lot of MRI technology at The University of Nottingham, where Sixty Symbols is filmed. He was awarded the Nobel Prize for his work. Professor Richard Bowtell explains the technology in this video.